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Functional Troubleshooting

This section covers problems with the numbers rather than with the hardware itself.
Some functions missing.
Boatspeed not zero when it should be.
  • (Several Knots) Usually caused by the AC power to the battery charger. Try disconnecting the boat from shore power.
  • (Small number or Intermittent) Caused by current or vibration transmitted through the hull to the paddle.
NOTE: because they have no bearings to unstick, ultrasonic boatspeed sensors will typically show a few tenths of a knot at the dock.
Apparent Wind Speed not zero when it should be.
  • (Several Knots) Usually caused by the AC power to the battery charger. Try disconnecting the boat from shore power.
  • Caused by mast vibration.
  • Apparent wind speed modified by roll rate. See discussion in Section 4, Option 8.
Bad Wind Direction.
  • No True Wind Speed. Since true wind is a vector solution, when true wind speed is zero, True Wind Direction has no meaning and is set equal to Heading.
  • Check True Wind Angle, True Wind Speed and Heading for proper values.
Bad True Wind Angle.
  • Zero True Wind Angle. Since True Wind is a vector solution, when True Wind Speed is zero, True Wind Angle has no meaning, and is set to 0.
  • Check Apparent Wind Angle, Apparent Wind Speed and Boatspeed for proper values.
Bad Apparent Wind Angle.
  • Apparent wind angle modified by roll rate. See Setting Mast Height.
  • Bad masthead sensoror or connection between masthead and interface. Check for TEST Errors 33, 34 and 35.
  • Loose masthead bracket.
Bad Heading.
  • No power to heading sensor. Most heading sensors require a separate power supply. Check that the heading sensor is receiving power.
  • Some magnetic item has gotten near the sensor.
  • Sensor needs compensation.
LOG or TIME resets on power up or engine start. Dead backup battery. Return CPU for service when convenient.
Wierd See Display Troubleshooting.
More detail:
Technical papers on Troubleshooting
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